Drilling apparatus



W A. SMITH. DRILLING APPARATUS. APPLICATION FILED APR. e, 1918.

Patented June 29, 1920.

% \\%\%\N T WY To all whom it may concern:

'UNITED STATES. PATENT OFFlCE WILLIAM A. SMITH, OF EASTON, PENNSYLVANIA, ASSIGNOR TO THE DENVER ItOCk DRILL MANUFACTURING COMPANY, OF'DENVER, COLORADO, A CORPORATION OE DELAWARE.

Be it known that I, WILLIAM A. SMITH, a citizen of the United States, residing at Easton, in the county of Northampton and State of Pennsylvania, have invented certain new and useful Improvements in Drilling Apparatus, of which the following is a specificaton. p

The present invention relates to drilling apparatus, and more particularly to means for supplying cleansing fluid to the bore of a drill bit for delivery to the bottom of the drill hole to eject the cuttings.

The principal object is to provide simple and effective means of a novel character for supplying both gaseous and liquid cleansing fluid to the drill steel bore.

The preferred embodiment of the invention is illustrated in the accompanying drawings, wherein Figure 1 is a longi tudinal sectional view through the head end of a well known type of drilling apparatus. I

Fig. 2 is a sectional view on the l ne 2-2 of Fig. 1.

Similar reference numerals designate corresponding parts in all the figures of the drawings.

In the embodiment illustrated, a portion of the usual barrel is illustrated at 3, the piston chamber 4 being closed by a head 5 fitted to the front end of said barrel. The chuck is shown at 6, and interposed between the chuck and head. is a collar 7. The chuck 6 includes a bushing 8 for the reception f the rear end of the drill steel, a portion of which is illustrated at 9. I This steel, as usual, has a bore 10 longitudinally therethrough for directing cleansing fluid to the bottom of the drill hole:

The collar 7 is provided with a nipple having a liquid inlet 11 terminating in a relatively small port 12. Thejoint between the collar 7 and the head 5 is such as to provide an annular groove or passageway 13 that is in communication with one side of DRILLING APPARATUS.

Specification of Letters Patent. i Patented J 1920 Application filed April e, 1918. Serial No. 227,003.

a washer 19 that abuts against the rear end i of the collar 7 Slidably mounted in the collar 7 and the head, is a tappet 20 having a passageway 21* that communicates with the port l2"an' d" with the bore 10 of a drill steehplaced port 15, and unseating the valve 17, will' I find its way through thepassageway'13 and port 14 to the inlet 11, so that it will also be.

back pressure of the fluid will, however,-b'e prevented by the ball 17 seating itself.

From the foregoing, it is thought that the construction, operation and many advan- Having thus fully described my invention,

what I claim as new, and desire to secure by Letters Patent, is 2- 1. In drilling apparatus ofthe character set forth, the combination with a barrel and a head therefor, of a chuck, a tappet holding collar interposed between the head and chuck and having a cleansing fluid inlet, a tappet in the collar having a cleansing fluid port communicating with the inlet and delivering to the bore of a steel placed in the chuck, and a passageway in the head communicating with the barrel and the inlet for delivering fluid from the former to the latter.

2'. In drilling apparatus of the character set forth, the combination with a barrel and a head therefor, of a chuck, a tappet holding collar interposed between the head and chuck and having a fluid cleansing inlet, the juncture of the head and collar forming a fluid passageway, a port in the head affording communication between the barrel and passageway, a port in the collar affording directedto the bore of the drill "steel. Any

communication between the passageway and inlet, and a tappet in the collar having a cleansing fluid port communicating with the inlet and delivering to the bore of a steel placed inthe chuck. 1

3. In drilling, apparatus of the character" set forth, the combination with a barrel and I 5'. In'drilling apparatus of the character 'set forth-,jthe combination with a barrel and a head therefor, ofa chuck, a'tappet hold'mg collar interposed between ,the head and chuck and having a cleansing fluid inlet, a] tappet in the collar-having a cleansing fluid.

ortcommunicating withsthe inlet and-deivering to the bore of a steel placed in the chuck, aupassagewayin the head 'communik catingwith the barrel'an'd'the inlet for de-' 9 livering fluid from the former to'the latter, and'acheck valve for preventing the flow of fluid from the-inlet to the barrel'and preventin to the inlet.

a head therefor, of a chuck, a tappet holdin collar. inter osed between the head an chuck and aving a cleansing fluid inlet,

the juncture of the head and collar forming a fluid passageway, a port in the head affording communication between the barrel and passageway, a port in the collar afl'ording communication between the passageway r and inlet, a tappet in the collarhaving a the flow of fluid from the barrel venting the flow of fluid through the port to the barrel.

ahead therefor, of a chuck, a collar interp osed-' between the chuck and head, the joint between the collar and'head forming an an nular passageway, said collar having a fluid inlet, a ort connecting the annular'passagewayand the inlet, a port connecting the barrel and passageway, said. port having an internal valve seat, a valvecooperating with valve, said valve-and spring being held-in g I Y place b the collar, anda tappetslidable in 4. In drillingapparatus' of the character set forth, the combination with a barrel and the col iii and head'and having a passageway communicating with the fluid inlet for placed in the chuck. I

i 'In testimony whereof I aflix my signature in the presence of two'witnesses.

WILLIAM A. SMITH.

Witnesses:

M. WELLER,

W. E. BIBLEHEIMER.

the'seat, a spring operating" against the 

